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  <title>Document</title>
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<body>
    <script>
      var arr = [
        { id: '29', pid: '', name: '总裁办' },
        { id: '2c', pid: '', name: '财务部' },
        { id: '2d', pid: '2c', name: '财务核算部' },
        { id: '2f', pid: '2c', name: '薪资管理部' },
        { id: 'd2', pid: '', name: '技术部' },
        { id: 'd3', pid: 'd2', name: 'Java研发部' },
        { id: 'd31', pid: 'd3', name: 'Java研发部333' },
        { id: 'd33', pid: 'd3', name: 'Java研发部333' },
      ];
      function getsome(list , lodId){
        const arr = []
        list.forEach(item => {
          if(item.pid === lodId ){
            item.children = getsome(list , item.id)
            arr.push(item)
          }
        })
        return arr
      }
      console.log(getsome(arr,''));
    </script>
</body>
</html>
